diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcff6b28d9e..02aa4ca73b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -114,6 +114,7 @@ Ansible Changes By Release
     * https://github.com/ansible/ansible/blob/2fff690caab6a1c6a81973f704be3fbd0bde2c2f/lib/ansible/module_utils/six/__init__.py
 * Update ipaddr Jinja filters to replace existing non RFC compliant ones. Added additional filters for easier use
   of handling IP addresses. (PR# 26566)
+* datetime filter updated to use default format of datetime.datetime (ISO8601)
 
 #### New Callbacks:
 - full_skip